WO2020153786A1 - Lentille liquide - Google Patents

Lentille liquide Download PDF

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Publication number
WO2020153786A1
WO2020153786A1 PCT/KR2020/001164 KR2020001164W WO2020153786A1 WO 2020153786 A1 WO2020153786 A1 WO 2020153786A1 KR 2020001164 W KR2020001164 W KR 2020001164W WO 2020153786 A1 WO2020153786 A1 WO 2020153786A1
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WO
WIPO (PCT)
Prior art keywords
liquid
lens
disposed
optical member
liquid lens
Prior art date
Application number
PCT/KR2020/001164
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English (en)
Korean (ko)
Inventor
한정은
김원진
엄성수
Original Assignee
엘지이노텍(주)
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Publication date
Application filed by 엘지이노텍(주) filed Critical 엘지이노텍(주)
Publication of WO2020153786A1 publication Critical patent/WO2020153786A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B1/00—Optical elements characterised by the material of which they are made; Optical coatings for optical elements
    • G02B1/10—Optical coatings produced by application to, or surface treatment of, optical elements
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B3/00—Simple or compound lenses
    • G02B3/12—Fluid-filled or evacuated lenses
    • G02B3/14—Fluid-filled or evacuated lenses of variable focal length

Definitions

  • Embodiments relate to liquid lenses.
  • the various shooting functions include at least one of an optical zoom function (zoom-in/zoom-out), an auto-focusing (AF) function, or an image stabilization or image stabilization (OIS) function.
  • an optical zoom function zoom-in/zoom-out
  • AF auto-focusing
  • OIS image stabilization or image stabilization
  • the autofocus and image stabilization functions are fixed to the lens holder and are performed by tilting or tilting a plurality of lenses aligned with the optical axis in the vertical direction of the optical axis or optical axis.
  • a separate lens driving device for driving is required.
  • the lens driving device has high power consumption, and there is a problem in that the overall size of the existing camera module is increased, such as adding a cover glass separately from the camera module to protect it.
  • studies have been conducted on a liquid lens unit that performs autofocus and image stabilization functions by electrically adjusting the curvatures of the interfaces of the two liquids.
  • WFE wave front error
  • An embodiment is to provide a liquid lens with a reduced wavefront error.
  • the technical problem to be solved in the embodiment is not limited to the technical problem mentioned above, and another technical problem not mentioned will be clearly understood by a person having ordinary knowledge in the technical field to which the present invention belongs from the following description. Will be able to.
  • the liquid lens includes a first plate including a cavity in which a conductive liquid and a non-conductive liquid are disposed; A first electrode disposed on the first plate; A second electrode spaced apart from the first electrode and disposed on the first plate and at least partially disposed on the cavity; An insulating layer disposed on the second electrode; And an optical member disposed between the conductive liquid and the non-conductive liquid.
  • the refractive index of the optical member may have a value between the refractive index of the first liquid and the refractive index of the second liquid.
  • the optical member may have a fluidity less than that of each of the first and second liquids.
  • the optical member may have a transmittance of 95% or more.
  • the wettability between the optical member and the second liquid may be greater than the wettability between the optical member and the first liquid.
  • the material of the optical member may include silicate.
  • the cavity forms a first opening on one side and a second opening on the other side, the size of the first opening is larger than the size of the second opening, and the size of the optical member is smaller than the first opening and the It may be larger than the second opening.
  • the optical member may have a size smaller than the size of the interface between the first liquid and the second liquid in the reference diopter.
  • the liquid lens may include a coating layer disposed on the insulating layer.
  • the liquid lens according to the embodiment of the driving voltage supplied to the liquid lens to perform the OIS function by placing an optical member having a fluidity smaller than the fluidity of each of the first and second liquids between the first liquid and the second liquid Even if the amount of change is large, the occurrence of wavefront errors can be minimized, and even in large diameters, OIS functions can be faithfully performed without being affected by wavefront errors.
  • FIG. 1 is a sectional view showing a liquid lens module including a liquid lens according to an embodiment.
  • FIG. 2A and 2B show a partially enlarged cross-sectional view according to an embodiment of the portion'A' shown in FIG. 1.
  • FIG. 3 exemplarily shows a state in which the optical member is tilted in the liquid lens shown in FIG. 1.
  • FIG. 4 is a graph showing a wavefront error according to a comparative example and an embodiment.
  • FIG. 5 is a conceptual diagram of a lens assembly including a liquid lens module according to an embodiment.
  • FIG. 6 is a conceptual diagram of a camera module including a liquid lens module according to an embodiment.
  • the terms used in the embodiments of the present invention are for describing the embodiments and are not intended to limit the present invention.
  • the singular form may also include the plural form unless specifically stated in the phrase, and is combined with A, B, C when described as “at least one (or more than one) of A and B, C”. It can contain one or more of all possible combinations.
  • first, second, A, B, (a), and (b) may be used. These terms are only for distinguishing the component from other components, and the term is not limited to the nature, order, or order of the component.
  • a component when a component is described as being'connected','coupled' or'connected' to another component, the component is not only directly connected, coupled or connected to the other component, but also to the component It may also include the case of'connected','coupled' or'connected' due to another component between the other components.
  • top (top) or bottom (bottom) when described as being formed or disposed in the “top (top) or bottom (bottom)” of each component, the top (top) or bottom (bottom) is not only when two components are in direct contact with each other, but also one It also includes a case in which another component described above is formed or disposed between two components.
  • up (up) or down (down) when expressed as “up (up) or down (down)”, it may include the meaning of the downward direction as well as the upward direction based on one component.
  • the variable lens may be a variable focus lens. Also, the variable lens may be a lens whose focus is adjusted.
  • the variable lens may be at least one of a liquid lens, a polymer lens, a liquid crystal lens, a VCM type, and an SMA type.
  • the liquid lens may include a liquid lens including one liquid and a liquid lens including two liquids.
  • the liquid lens including one liquid may change the focus by adjusting the membrane disposed at a position corresponding to the liquid, and for example, the focus may be changed by pressing the membrane by the electromagnetic force of the magnet and the coil.
  • the liquid lens including two liquids may control the interface formed by the conductive liquid and the non-conductive liquid by using a voltage applied to the liquid lens, including the conductive liquid and the non-conductive liquid.
  • the polymer lens can change the focus of the polymer material through a driving unit such as a piezo.
  • the liquid crystal lens can change the focus by controlling the liquid crystal by electromagnetic force.
  • the VCM type can change the focus by adjusting the solid lens or the lens assembly including the solid lens through an electromagnetic force between the magnet and the coil.
  • the SMA type may use a shape memory alloy to control a solid lens or a lens assembly including the solid lens to change focus.
  • variable lens according to the embodiment will be described as a liquid lens, but the following description of the liquid lens may be applied to other types of variable lenses.
  • a lens module including a variable lens according to an embodiment a lens assembly including the module, and a camera module including the assembly are described as including a liquid lens as a variable lens, but a lens module, a lens assembly, and a camera module The description of can be applied even when other types of variable lenses are included.
  • a liquid lens according to an embodiment, a liquid lens module including the liquid lens, a lens assembly including the module, and a camera module including the assembly will be described using a Cartesian coordinate system, but the embodiment is not limited thereto. . That is, according to the Cartesian coordinate system, the x-axis, y-axis, and z-axis are orthogonal to each other, but the embodiment is not limited thereto. That is, the x-axis, y-axis, and z-axis may intersect each other instead of being orthogonal.
  • FIG. 1 is a sectional view of a liquid lens module 100 including a liquid lens according to an embodiment.
  • the liquid lens module 100 may include a liquid lens, a first connecting substrate 141 and/or a second connecting substrate 144.
  • the liquid lens according to the embodiment includes different types of first and second liquids LQ1 and LQ2, first to optical members P1, P2, P3, and P4, first and second electrodes E1 and E2, and An insulating layer 148 may be included.
  • the first and second liquids LQ1 and LQ2 are filled, accommodated, or disposed in a cavity (CA), and the first liquid (or conductive liquid) LQ1 having conductivity and the second liquid having nonconductivity ( Alternatively, an insulating liquid or a non-conductive liquid (LQ2) may be included.
  • the first liquid LQ1 and the second liquid LQ2 do not mix with each other, and an interface BO (see FIG. 2A to be described later) may be formed at a contact portion between the first and second liquids LQ1 and LQ2.
  • the first liquid LQ1 may be disposed on the second liquid LQ2, but the embodiment is not limited thereto.
  • the edges of the first and second liquids LQ2 and LQ1 in a state in which the driving voltage is not applied from the outside to the liquid lens may have a cross-sectional shape with a thickness thinner than the center.
  • the first plate P1 may include a cavity CA.
  • the inner surface i of the first plate P1 may define a side portion of the cavity CA. At this time, the inner surface i of the first plate P1 may be inclined as illustrated in FIG. 1, but the embodiment is not limited thereto.
  • the first plate P1 may include upper and lower first and second openings O1 and O2. That is, the cavity CA may be defined as an area surrounded by the inner surface i of the first plate P1, the first opening O1 and the second opening O2.
  • the cavity CA forms the first opening O1 on one side and the second opening O2 on the other side, and the size of the first opening O1 may be larger than the size of the second opening O2.
  • the diameter of the wider opening among the first and second openings O1 and O2 may vary according to a required angle of view (FOV) required by the liquid lens or a role to be performed in a camera module described later including the liquid lens.
  • FOV required angle of view
  • the size (or area or width) of the first opening O1 may be larger than the size (or area or width) of the second opening O2.
  • the size of each of the first and second openings O1 and O2 may be a cross-sectional area in a horizontal direction (eg, x-axis and y-axis directions).
  • each of the first and second openings O1 and O2 may mean a radius or a diameter when the cross-section of the opening is circular, or a length of a diagonal line when the cross-section of the opening is square.
  • Each of the first and second openings O1 and O2 may have a shape of a hole having a circular cross section.
  • the cavity CA is a portion through which light incident from the outside is transmitted. Therefore, the first plate P1 constituting the cavity CA may be made of a transparent material, or may be an opaque material or contain impurities so that light is not easily transmitted.
  • the light may be incident through the first opening O1 wider than the second opening O2 in the cavity CA, and may be emitted through the second opening O2, or the second opening narrower than the first opening O1 ( O2) to be incident through the first opening (O1).
  • O1 the first opening
  • O2 the second opening narrower than the first opening O1
  • the second plate P2 may be disposed at one of the top or bottom of the first plate P1, and the third plate P3 may be disposed at the other of the top or bottom of the first plate P1.
  • the second plate P2 may be disposed on the first plate P1, and the third plate P3 may be disposed below the first plate P1.
  • the second plate P2 may be disposed on the upper surface of the first electrode E1 and the cavity CA.
  • the third plate P3 may be disposed under the second electrode E2 and under the cavity CA.
  • the second plate P2 and the third plate P3 may be disposed to face each other with the first plate P1 therebetween. Also, at least one of the second plate P2 or the third plate P3 may be omitted.
  • At least one of the second or third plates P2 and P3 may have a rectangular planar shape.
  • Each of the second and third plates P2 and P3 is a region through which light passes, and may be made of a translucent material.
  • each of the second and third plates P2 and P3 may be made of glass, and may be formed of the same material for convenience of processing.
  • the edges of each of the second and third plates P2 and P3 may have a rectangular shape, but are not limited thereto.
  • the third plate P3 may have a configuration that allows the incident light to proceed into the cavity CA of the first plate P1.
  • the second plate P2 may have a configuration that allows light passing through the cavity CA of the first plate P1 to be emitted.
  • the second plate P2 may have a configuration that allows the incident light to proceed into the cavity CA of the first plate P1.
  • the third plate P3 may have a configuration that allows light passing through the cavity CA of the first plate P1 to be emitted.
  • the second plate P2 may directly contact the first liquid LQ1.
  • first and second electrodes E1 and E2 may be disposed on one surface and the other surface of the first plate P1, respectively.
  • the first electrode E1 may be disposed to be spaced apart from the second electrode E2 in at least a portion of one surface (eg, an upper surface) of the first plate P1.
  • a portion of the first electrode E1 disposed on one surface of the first plate P1 is exposed to the first liquid LQ1 having conductivity and may directly contact the first liquid LQ1.
  • the plurality of second electrodes E2 may be disposed on other surfaces (eg, an upper surface, an inner surface, and a lower surface) of the first plate P1.
  • the first electrode E1 is disposed on the first plate P1
  • the second electrode E2 is spaced apart from the first electrode E1 and disposed on the first plate P1, and at least a portion of the cavity is formed. (CA).
  • first electrode E1 may be one electrode (hereinafter referred to as “common electrode”)
  • second electrode E2 may be n electrodes (hereinafter referred to as “individual electrode”).
  • n may be a positive integer of 2 or more.
  • the plurality of second electrodes E2 may be sequentially arranged along a clockwise direction (or counterclockwise direction) around the optical axis LX.
  • Each of the first and second electrodes E1 and E2 may be made of a conductive material, for example, made of metal.
  • the insulating layer 148 may be disposed while covering a part of the upper surface of the third plate P3 in the lower region of the cavity CA. That is, the insulating layer 148 may be disposed between the second liquid LQ2 and the third plate P3.
  • the insulating layer 148 may be disposed on the second electrode E2.
  • the insulating layer 148 may be disposed while covering a part of the second electrode E2 forming the sidewall of the cavity CA. In addition, the insulating layer 148 may be disposed on the upper surface of the first plate P1, covering a part of the first electrode E1 and the entirety of the second electrode E2. In addition, the insulating layer 148 may be disposed while covering a part of the upper surface of the first plate P1 exposed by the separation of the first electrode E1 and the second electrode E2.
  • the insulating layer 148 is in contact with the second electrode E2 and the first liquid LQ1, the contact between the second electrode E2 and the second liquid LQ2, and the third plate P3 and the second The contact between the liquid LQ2 can be blocked.
  • the insulating layer 148 covers one electrode (eg, the second electrode E2) of the first and second electrodes E1 and E2, and the other electrode (eg, the first electrode E1) )) to expose a portion of the first liquid (LQ1) having conductivity so that electrical energy is applied.
  • first connection substrate 141 may be electrically connected to an electrode pad formed on a main substrate (not shown) described below through a connection pad electrically connected to the first electrode E1.
  • the second connection substrate 144 may be electrically connected to the electrode pads formed on the main substrate through connection pads electrically connected to each of the plurality of second electrodes E2.
  • the first connection substrate 141 may be implemented as an FPCB or a single metal substrate (conductive metal plate), and each of the second connection substrates 144 may be implemented as an FPCB (Flexible Printed Circuit Board).
  • FPCB Flexible Printed Circuit Board
  • a conductive epoxy is disposed between the first connection substrate 141 and the first electrode E1, so that the first connection substrate 141 and the first electrode E1 can be contacted, coupled, and energized. have.
  • a conductive epoxy is disposed between the second connection substrate 144 and the plurality of second electrodes E2, so that the second connection substrate 144 and the plurality of second electrodes E2 can be contacted, coupled, and energized. have.
  • the first connection substrate 141 and the first electrode E1 may be implemented as separate elements from each other, or may be integrally implemented.
  • the second connection substrate 144 and the plurality of second electrodes E2 may be implemented as separate elements from each other or may be implemented as an integral type.
  • the first connecting substrate 141 can transmit one voltage (hereinafter referred to as a “common voltage”) to the liquid lens, and the second connecting substrate 144 has four different voltages (hereinafter referred to as “individual voltage”). ) To the liquid lens.
  • the common voltage may include a DC voltage or an AC voltage, and when the common voltage is applied in the form of a pulse, the width or duty cycle of the pulse may be constant.
  • the individual voltages supplied through the second connection substrate 144 may be applied to the plurality of second electrodes E2 exposed at each corner of the liquid lens. That is, a voltage may be supplied to the liquid lens through the first connecting substrate 141 and the second connecting substrate 144.
  • the optical member P4 of the liquid lens according to the embodiment may be disposed between the first liquid LQ1 and the second liquid LQ2.
  • the refractive index of the optical member P4 may have a value between the refractive index of the first liquid LQ1 and the refractive index of the second liquid LQ2. This is to ensure that light incident on the second opening O2 is emitted through the first opening O1 or light incident from the first opening O1 is emitted through the second opening O2.
  • the refractive index of the optical member P4 may be the same as the refractive index of the first liquid LQ1 or the refractive index of the second liquid LQ2.
  • the refractive index of the optical member P4 may be the same as the refractive index of the oil LQ2.
  • the optical member P4 may have a transmittance of 95% or more. Accordingly, light is passed through the cavity CA via the second liquid LQ2, the optical member P4, and the first liquid LQ1, without being obstructed or minimally obstructed by the optical member P4. Can.
  • the optical member P4 may be a plate-shaped plate, or may be in the form of a thin film or a membrane.
  • the optical member P4 may be made of a material that is not well bent (rigid) or a material that is flexible (flexibl).
  • the material of the optical member P4 may include silicate.
  • FIG. 2A and 2B show partial enlarged cross-sectional views of the “A” portion illustrated in FIG. 1 according to embodiments A1 and A2.
  • FIG. 3 exemplarily shows the tilting of the optical member P4 in the liquid lens shown in FIG. 1. Except that the optical member P4 is tilted, the liquid lens illustrated in FIG. 3 is the same as the liquid lens illustrated in FIG. 1, and thus the same reference numerals are used.
  • the optical member P4 may have a flat cross-sectional shape at the reference diopter of the liquid lens.
  • the reference diopter may mean a '0' diopter.
  • the '0' diopter means that the interface BO between the first liquid LQ1 and the second liquid LQ2 is not tilted and is perpendicular to the optical axis LX (for example, the x-axis and y-axis directions). It can mean side by side.
  • At least a portion of the optical member P4 in the reference diopter may be disposed spaced apart from the insulating layer 148.
  • the end portion P4E of the optical member P4 is an insulating layer disposed on the inner surface i of the first plate P1 ( 148).
  • the liquid lens may further include a coating layer 150.
  • the coating layer 150 may be disposed on the inner surface i of the first plate P1. That is, the coating layer 150 may be disposed on a path facing when the optical member P4 is tilted among the inner surfaces i of the first plate P1 and may be disposed on the insulating layer 148. As described above, when the coating layer 150 is disposed, the end portion P4E of the optical member P4 may be disposed in contact with the coating layer 150 disposed on the inner surface i of the first plate P1.
  • the coating layer 150 may be implemented with a material having a frictional force with the end portion P4E smaller than that of the insulating layer 148.
  • the coating layer 150 may include fluorine, but embodiments are not limited thereto.
  • the end portion P4E of the optical member P4 may be spaced apart by a predetermined distance d1, d2 from the insulating layer 148 (or the inner surface i), as shown in FIG. 2A. have. That is, the first or second liquids LQ1 and LQ2 may be positioned between the end portion P4E of the optical member P4 and the insulating layer 148 in the reference diopter. Accordingly, as shown in FIG. 1 where the end P4E is in contact with the insulating layer 148, as shown in FIGS.
  • the end P4E is not in contact with the insulating layer 148, so the optical member ( Since the frictional force between the end portion P4E and the insulating layer 148 does not occur when tilting P4), the coating layer 150 shown in FIG. 2B may be omitted.
  • the wettability (or wettability) between the optical member P4 and the second liquid LQ2 may be greater than the wettability between the optical member P4 and the first liquid LQ1. Accordingly, as shown in FIGS. 2A and 3, the optical member P4 is disposed above the second liquid LQ2 under the interface BO between the first liquid LQ1 and the second liquid LQ2. Can.
  • the size (or area or diameter) X1 of the optical member P4 may be smaller than the size of the first opening O1 and larger than the size of the second opening O2.
  • the size (or area or diameter) X1 of the optical member P4 is the size (or area or diameter) of the interface BO between the first liquid LQ1 and the second liquid LQ2 in the reference diopter. )(X2).
  • the lens assembly, the camera module, and the optical device including the liquid lens are image stabilizer to image Anti-shaking (OIS: Optical Image Stabilizer) can be performed.
  • OIS Optical Image Stabilizer
  • WFE wavefront error
  • the liquid lens according to the comparative example does not include the optical member P4. Therefore, when the change amount ⁇ V of the driving voltage V supplied to the liquid lens according to the comparative example to perform the OIS function is large, the wavefront error WFE1 at the interface BO of the liquid lens may be increased. This wavefront error WFE1 may be further exacerbated when the diameter of the second opening O2 is 3 mm or more as the liquid lens is large-cured.
  • the optical member P4 is disposed between the first liquid LQ1 and the second liquid LQ2.
  • the change amount ( ⁇ V) of the driving voltage V supplied to the liquid lens to perform the OIS function Even in this case, the occurrence of wavefront error (WFE2) is minimized and may be smaller than the comparative example.
  • the liquid lens module including the liquid lens according to the above-described embodiment can be applied to various fields.
  • the lens assembly 200 including the liquid lens according to the embodiment will be described with reference to the accompanying drawings, but the lens assembly 200 according to the embodiment is not limited thereto.
  • FIG 5 is an exploded view of the lens assembly 200 including the liquid lens module 100 according to the embodiment.
  • the lens assembly 200 illustrated in FIG. 5 may include at least one of a holder 210, a first lens unit 220, a liquid lens module 230, and a second lens unit 240.
  • the liquid lens module 230 may be the liquid lens module 100 shown in FIGS. 1 to 3.
  • the first lens unit 220 is disposed on the upper side of the liquid lens module 230 and may be an area where light is incident from the outside of the lens assembly 200. That is, the first lens unit 220 may be disposed on the liquid lens module 230 in the holder 210.
  • the first lens unit 220 may be implemented as a single lens, or may be implemented as two or more lenses that are aligned with respect to a central axis to form an optical system.
  • the central axis may mean an optical axis LX of an optical system formed by the first lens unit 220, the liquid lens module 230, and the second lens unit 240, and an axis parallel to the optical axis LX. It can also mean.
  • the optical axis LX may correspond to the optical axis of the image sensor 340 included in the camera module 300 described below. That is, the first lens unit 220, the liquid lens module 230, the second lens unit 240, and the image sensor 340 described later in FIG. 6 are optical axes LX through active alignment (AA). ).
  • the second lens unit 240 may be disposed under the liquid lens module 230 inside the holder 210.
  • the second lens unit 240 may be disposed spaced apart from the first lens unit 220 in the optical axis direction (eg, the z-axis direction).
  • the second lens unit 240 may be embodied as one lens, or may be embodied as two or more lenses that are aligned with respect to the central axis to form an optical system.
  • each of the first lens unit 220 and the second lens unit 240 is a solid lens, and may be implemented as glass or plastic, but an embodiment includes the first lens unit 220 and The second lens unit 240 is not limited to each specific material. Also, at least one of the first lens unit 220 or the second lens unit 240 may be omitted. In addition, unlike illustrated in FIG. 5, the liquid lens module 230 may be disposed above the first lens unit 220 or below the second lens unit 240.
  • the holder 210 serves to receive, mount, seat, contact, fix, temporarily fix, support, engage, or place the first lens unit 220, the liquid lens module 230, and the second lens unit 240. do. While the first lens unit 220 and the second lens unit 240 are accommodated inside the holder 210, some of the liquid lens module 230 is accommodated inside the holder 210, and the other is a holder ( 210) may be disposed to protrude to the outside. This is to electrically connect the first and second connecting substrates 141 and 144 of the liquid lens module 230 with the main substrate 350 described later in FIG. 6. Since the first and second connecting substrates 141 and 144 are connected to the main substrate 350, the liquid lens module 230 may receive a driving voltage for driving from the main substrate 350.
  • a camera module 300 including a liquid lens module according to an embodiment will be described with reference to the accompanying drawings.
  • FIG. 6 is an exploded view of the camera module 300 including the liquid lens module 100 according to the embodiment.
  • the camera module 300 illustrated in FIG. 6 may include a lens assembly 200, an image sensor 340, and a main substrate 350.
  • the lens assembly 200 corresponds to the lens assembly shown in FIG. 5, the same reference numerals are used, and overlapping descriptions are omitted.
  • the image sensor 340 is disposed between the main substrate 350 and the lens assembly 200, so that the first lens unit 220, the liquid lens module 230, and the second lens unit 240 of the lens assembly 200 are It may perform a function of converting the light passing through to image data. More specifically, the image sensor 340 may convert light into an analog signal through a pixel array including a plurality of pixels, and synthesize digital signals corresponding to the analog signals to generate image data.
  • the main substrate 350 is disposed under the lens assembly 200, and an image sensor 340 can be mounted, seated, contacted, fixed, temporarily fixed, supported, coupled, or accommodated in a groove, circuit element (not shown) ), FPCB, and the like (not shown) and a connector (not shown).
  • the main substrate 350 serves to apply driving voltages to the individual electrodes E2 and the common electrode E1 of the liquid lens through the first and second connecting substrates 141 and 144.
  • Circuit elements of the main substrate 350 may constitute a control module that controls the liquid lens module 230 and the image sensor 340.
  • the main substrate 350 may include a holder region in which the holder 210 is disposed and an element region in which a plurality of circuit elements are disposed.
  • the camera module 300 may further include a middle base 320.
  • the middle base 320 may be disposed while surrounding the lower portion of the holder 210 shown in FIG. 5.
  • the middle base 320 may be omitted as a member present to be gripped by a gripper when performing an active alignment in the camera module 300 shown in FIG. 6.
  • the middle base 320 may be spaced apart from a circuit element (not shown) disposed on the main substrate 350 and mounted on the main substrate 350.
  • the camera module 300 may further include a sensor base and a filter 330.
  • the filter may filter light corresponding to a specific wavelength range with respect to light passing through the first lens unit 220, the liquid lens module 230, and the second lens unit 240.
  • the filter may be an infrared (IR) blocking filter or an ultraviolet (UV) blocking filter, but embodiments are not limited thereto.
  • the filter can be disposed over the image sensor 340.
  • the filter can be placed inside the sensor base. For example, the filter may be placed or mounted in the inner groove or step of the sensor base.
  • the sensor base is disposed under the middle base 320 and may be attached to the main substrate 350.
  • the sensor base surrounds the image sensor 340 and protects the image sensor 340 from foreign objects or impact.
  • the camera module 300 may further include a cover 310.
  • the cover 310 is disposed to surround the holder 210, the liquid lens module 230, and the middle base 320, thereby protecting them 210, 230, and 320 from external impact.
  • the cover 310 may protect a plurality of lenses forming an optical system from external impact.
  • an optical device may be implemented using the camera module 300 including the lens assembly according to the above-described embodiment.
  • the optical device may include a device capable of processing or analyzing an optical signal.
  • Examples of the optical device may include a camera/video device, a telescope device, a microscope device, an interferometer device, a photometer device, a polarimeter device, a spectrometer device, a reflectometer device, an autocollimator device, a lens meter device, etc., and may include a lens assembly. This embodiment can be applied to a possible optical device.
  • the optical device may be implemented as a portable device such as a smart phone, a notebook computer, and a tablet computer.
  • These optical devices include a camera module 300, a display unit (not shown) that outputs an image, a battery (not shown) that supplies power to the camera module 300, a camera module 300, and a display unit and a battery.
  • It may include a body housing.
  • the optical device may further include a communication module capable of communicating with other devices and a memory unit capable of storing data. The communication module and the memory unit may also be mounted in the body housing.
  • the liquid lens according to the embodiment is a camera/video device, a telescope device, a microscope device, an interferometer device, a photometer device, a polarimeter device, a spectrometer device, a reflectometer device, an autocollimator device, a lens meter device, a smartphone, a notebook computer, a tablet computer It can be used for.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Automatic Focus Adjustment (AREA)
  • Mechanical Light Control Or Optical Switches (AREA)

Abstract

Une lentille liquide selon un mode de réalisation comprend: une première plaque comprenant une cavité dans laquelle un liquide conducteur et un liquide non conducteur sont disposés; une première électrode disposée sur la première plaque; une seconde électrode qui est disposée sur la première plaque pour être espacée de la première électrode et qui a au moins une partie de celle-ci disposée dans la cavité; une couche d'isolation disposée sur la seconde électrode; et un élément optique disposé entre le liquide conducteur et le liquide non conducteur.
PCT/KR2020/001164 2019-01-25 2020-01-23 Lentille liquide WO2020153786A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2019-0009791 2019-01-25
KR1020190009791A KR20200092645A (ko) 2019-01-25 2019-01-25 액체 렌즈

Publications (1)

Publication Number Publication Date
WO2020153786A1 true WO2020153786A1 (fr) 2020-07-30

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PCT/KR2020/001164 WO2020153786A1 (fr) 2019-01-25 2020-01-23 Lentille liquide

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KR (1) KR20200092645A (fr)
WO (1) WO2020153786A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070085353A (ko) * 2004-11-17 2007-08-27 코닌클리케 필립스 일렉트로닉스 엔.브이. 유체 자외선 렌즈
JP2010509640A (ja) * 2006-11-07 2010-03-25 コーニング インコーポレイテッド 複合液体レンズ及びこれを組み込んだ光学装置
US20130128368A1 (en) * 2010-07-20 2013-05-23 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Fluidic variable focal length optical lens and method for manufacturing the same
KR20180015912A (ko) * 2016-08-04 2018-02-14 명지대학교 산학협력단 전기습윤을 이용한 유체 광학 장치 및 이의 구동 방법
KR20180114804A (ko) * 2017-04-11 2018-10-19 엘지이노텍 주식회사 카메라 모듈 및 액체 렌즈의 제어 방법

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20070085353A (ko) * 2004-11-17 2007-08-27 코닌클리케 필립스 일렉트로닉스 엔.브이. 유체 자외선 렌즈
JP2010509640A (ja) * 2006-11-07 2010-03-25 コーニング インコーポレイテッド 複合液体レンズ及びこれを組み込んだ光学装置
US20130128368A1 (en) * 2010-07-20 2013-05-23 Fraunhofer-Gesellschaft Zur Foerderung Der Angewandten Forschung E.V. Fluidic variable focal length optical lens and method for manufacturing the same
KR20180015912A (ko) * 2016-08-04 2018-02-14 명지대학교 산학협력단 전기습윤을 이용한 유체 광학 장치 및 이의 구동 방법
KR20180114804A (ko) * 2017-04-11 2018-10-19 엘지이노텍 주식회사 카메라 모듈 및 액체 렌즈의 제어 방법

Also Published As

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KR20200092645A (ko) 2020-08-04

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